Original Nilfisk and Tellus 38mm to 32mm steel reducer with grey plastic friction ring. Usually for using and accessories on 38mm bent tube or a steel wand. There's a larger range of 32mm spare parts, brushes and nozzles etc, and they're a lot cheaper.

At the moment, standard postage is capped at a maximum of $30 within Australia, so maximise the saving on postage and buy something in the related parts below!